Swiss scientists have created a thin bioabsorbable microsegregation of magnesium, which can be used in medical implants for drug delivery. Under the action of external magnetic field the radio frequency part of the resonator is heated, forming a small hole in the protective polymer layer, through which it can be released the drug by acting on a small area of tissue. A study published in the journal Advanced Functional Materials.
Many implantable devices necessary to supply electricity, so they began work at the right time. Biodegradable batteries, supercapacitors and solar cells added to the device mass and volume or, in the case of photovoltaic devices, generate energy only if you are close to the skin. As an alternative method of delivering energy to devices within the body sometimes apply radio frequency magnetic fields, which interact with the resonant oscillating circuit inside the implant. If such circuits with different resonant frequencies are several, each of them can be controlled by applying a field with the desired frequency.
Mathieu Rugg (Matthieu Rüegg) with colleagues from the Federal Polytechnic school of Lausanne has applied this technology to create a magnesium bioabsorbable device for targeted drug delivery. Thermal evaporation they formed on a glass substrate a thin film of magnesium where the etching ion beam struck the figure obtained by photolithography. Then cleaned the plate excess protective polymer using an oxygen plasma and acetone.